Honing machine



Filed April 28, 1930 2 sheets-sheet 1 ,uw IM,

Allg 23, 1932- A. M. JOHNsoN 1,872,746

HONING MACHINE Filed April 28, 19250 2 Sheets-Sheet 2 Z5@ 1li @3f/"5 JY"f/74 f7- Jr" l I E I J6 L l l l l/ f Z/ ff/ i l Ef ff l i l /ff l IPatented Aug. 23, 1932 uNrrl-:DA STATES PATENT OFFICE. 1

ALBERT JOHNSQN, 0F BIOCKFQRD, ILLINOIS, ASSIGNOR T0 BARNES DRILLCOMPANY, i

or ROCKFQRD, lLLINOIs, `A centenario,n'or` ILLINOIS vrrorirlvd MAonINr.

Application :filed .April 2a i930- Seial 'NO- 447,854-

`The invention relates to honing machines of the type in which one ormore rapidly rotating honing tools are reciprocated by hydraulic meansfor the purpose of producing a smooth, highly inished'surface upon Vtheinterior of a hollow cylindrical body.

Such machines have -heretofore been applied for the most part tothe'inishing fof internal combustion ,engine cylinders" arranged inblocks of four, siX or eight' as'the case maybe. When thus applied, onlyafrelatively short stroke is required of the vhon-ing tools. The honingprocess may, however, be applied to great vadvantage to othercylindrical bodies such, for example, asDiesel engine cylinders, aircylinders and steam locomotive cylinders, but in view of thewidelyvarying range in sizes it is necessary .-to provide machines ofcorrespondingly diiierent sizes. lt is therefore one object offmyinventionto pro'- vide a honing machine of l,such construction thatit can be manufacturedv economically in a varying range of sizes'. Y

The larger cylinders must usually be `operated upon singly and suchmachines involve the'use of a single lspindle which is reciprocated by ahydraulically actuated means including a piston and cylinder capable odia stroke corresponding :to 'or slightly exceeding the length Aof thework. The length of such cylinders run asrhigh as llinches,necessitating aspindle stroke oi' `56i nches,and usually lthe work is ofsubstantial diameter so that the force applied to the lspindle toreciprocate .the same .must bevery substantial.

in character. At the same time itis very desirable to maintain theoverall dimensions of the machine as small as possible. Vlith this inview a further object of .my invention is to provide a honing machine-embodying a novel arrangement of the spindle, itshydraulicreciprocating means, andthe means lfor rotating the same, such that theforce applied for reciprocating purposes is well balanced :to insure atrueaxial thrust onthe spindle, while at the same time the overalllength of the machine is minimized. v

The above and other objects are attained through the provision of ahoning ,machine Vhaving `a .separately formedftransmiss'i'onreasingwhich,.in the case of a vertical typemachine, may be mounted on the topnof a column with a portion thereof projectingV over the side ofthe'column, a splined drivespindle extending through thetransmission'casin'g and having a head at its lower end, a pair ofactuating hars or rods slidably guided along opposite sides of thecasing for movement parallel to the Vdrive spindleand connected to thehead Yon Aopposite sides ,of the spindle, together with hydraulic meansfor simultane ously actuating the two rods whereby CQ apply a balancedactuating force tothe head for reciprocating the same', the two rodsalso serving to vprevent rotation ofthe head bythe drive spindle. i

Other objects and advantages will become apparent" :from the followingdescription ta-ken'in connection with the accompanying drawings, inwhich: Fig. 1 isa side elevational view of a-honing machine yembodyingthe -invention in yits pre1- 'ferryed form. Y f A Fig. 2 is an enlarged`iront elevational view 'of the 4transmission casing, the drive spindleand the means-for reciprocating the drive spindle. l 7

For purposes of 'disclosure thepreferred :form of the invention isillustra-ted in the drawings and will hereinafter he described in detailas applied toa vertical type honing machinabut it is Vto lbe understoodthat Vthis disclosure is not'intended as a llimitationfof the 'inventionto this type oiinachine, `it ibei'ng contemplated that various changesmight be made by vthose skilled in the art' -to adapt the invention toother ytypes 'of machines without departing -rom the spirit and Yscopeof the Yirrane'ntion as delined by the appended claims.

The invention, 'as herein illustrated, is'applied to va honing machineofl the vertical type, including a frame structure having a transmissioncasing l0 supported'on -the'vtop of a column l-l with .a spindle bearinghead 'in the form of a vertical cylindricalportion 10a of Athe casingpositioned in overhanging vrelation tor-the side 'oithecolumn lAspli-ned drive `spindle llextends axially through the'pro'jectingcylindrical portion 101y fof the casing and is movablelongitudinally through the casing toward and away from a work support11a positioned in front of the column 11.

The casing 10 houses suitable reduction and speed change gearing of awell known character, driven by a motor 13 mounted on the column, andincluding a gear 14e positioned in the cylindrical portion 10a of thecasing and engaging the splines 12a of the spindle 12. Vhen a singlehoning tool 15 is to be rotated by the spindle, the tool may be mountedd1- rectly on the lower end of the spindle 12.

In the use of the machine, the tool 15 is imultaneously rotated andreciprocated within apiece of work such as a cylinder 16, and thereciprocatory movement is obtained by hydraulically operated means. Toavoid increasing the overall length of themachine and at the same timeapply a true axial thrust to the spindle, I employ two piston andcylinder devices, one on each side of the portion 1050i the casing. Ofthese devices the cylinders 17 are secured on opposite sides of thecasing 10 parallel to the spindle 12, and pistons 17a in said cylindershave their rods 18 connected on opposite sides of the spindle to a head19 in which the lower end of the spindle is rotatably journaled. Sincethe pistonk rods 18 are connected to a head 19 eccentrically of thespindle axis, they serve not only to transmit reciprocatory movement tothe head and the spindle, but also function to prevent rotation of thehead by the spindle. VVVith this yarrangement of the rotating,reciprocating and guiding means, substantially the entire length of thespindle 12 ma be splined whereby to avoid. undue length of the spindle.The only portion of the spindle 12 which does not Vfunction as a slidingconnection during reciprocation of the head is that portion which liesbetween the lower end of the splines 12a and the head 19. Thus thelength of the unsplined portion is determined by the position of thegear 14 in the casing v10 and since it is not. dependent upon the sizeof the machine it may be made of the same length in large or smallmachines.

In constructing a machine of the character herein disclosed for anygiven size of Work, it will lbe apparent that within reasonable limits,a transmission casing 10 of the same size and construction may beernployed and the other elements of the machine may be assembled aboutthe casing 10 to provide for the desired length of stroke of the honingtool 15. To facilitate the assembly of the machine, the cylindricalportion 10a of the casing 10 has transversely extending headers 18a atits upper and lower ends, shaped to receive the cylinders 17 on theiropposite sides, and the cylinders are clamped in position by cap screws20a extending through lugs on the lower cylinder heads 20 and engagingthe lower header 18a. The cylinders are held against the upper header18a by clamps 21 which embrace the cylinders and are detachably securedto the header by cap screws 21a. Rods 22 secured Thus it will be seenthat cylinders 17 of various lengths may be secured on the casing 10without requiring alteration of the casing or its venclosed gearing. Thespindle 12 may also be made of any desired length without Vchanging theconstruction or size of the transmission casing 10 and without alteringthe arrangement of the gearing enclosed by the casing.

`Also it will be apparent that the construction provided permits of theconvenient removal of the head 19. This is of special advantage in thatit enables the replacement of one head by another as, for example, whenchanging from a single spindle head to a multiple spindle head in caseit is desired to operate upon two or more cylinders at the same time.

In constructing machines of various sizes, the vertical dimension of thecolumn 11 is, of course, varied and if additional clearance is vdesiredbetween the column and the axis of the tool 15, a forward projection 2limay be formed on the upper end of the column to permit the casing 10 tobe mounted or- ,l

Y by pressure fluid supplied at 25 to the cylinders 17 through suitablevalve-controlled connections (not shown) leadinglfrom the pump 26mounted on the column 11 and driven by the motor 13. Y

I claim as my invention: 1. A honing machine comprising, in combination,a column, a work support in front of'said column, a separately formedtransmissionccasing detachably secured on said column, said casinghaving a portion located in overhanging relation to said worksupport, adriven gear in said portion, a. splined spindle extending through saidportion and engaging said'y gear, a pair of cylinders, a pair ofhorizontally extending headers on the top and bottom of said portion,cylinder heads engaging the lower ends of said cylinders'and detachablysecured to the lower one of said headers to support the cylinders onsaid header, clamps embracing said cylinders and detachably secured tothe upper header to hold the cylinders against said upper headerinAparallel relation on opposite sides of said portion, heads for theupper ends of the cylinders, pistons in said cylinders having pistonrods extending through .said lower heads, anda transverse member inwhich the lower end of said spindle is journaled and to which saidpiston rods are connected on opposite sides of the spindle.

2. A honing machine comprising, in combination, a column, a separatelyformed transmission casing secured on the top of said column and havinga portion projecting over one edge of said column, a gear in saidportion, a splined shaft extending through said portion and engagingsaid gear, a pair of vertically positioned cylinders, heads engaging thelower ends of said cylinders to hold the same against bo-th lateral anddownward movement, said heads being detachably secured to opposite sidesof said portion Vadjacent the lower edge thereof, brackets engagingintermediate portions of said cylinders and detachably secured adjacentthe upper edge of said portion to hold the cylinders in verticalposition, heads on the upper ends of said cylinders, tie rods connectingthe upper and lower heads of each cylinder,'pistons in said cylindershaving piston rods extending through said lower heads, and a transversemember in which the lower end of said spindle is journaled and to whichsaid piston rods are connected on opposite sides of the spindle.

3. A machine of the character set forth comprising, in combination, acolumn, a work support on the lower end of said column, a separatelyformed head mounted on the upper end of the column and having a hollowextension disposed vertically at the forward side of the column abovesaid work support, headers at the upper and lower ends of said extensionhaving laterally projecting end portions, a splined spindle extendingthrough said headers centrally thereof, a pair of separately formedhydraulical cylinders, means for clamping said cylinders to saidprojecting end portions of the head-ers in parallel relation to saidspindle, pistons in said cylinders having rods depending therefrom, across head rigidly connecting the lower ends of said rods and having thelower end of said spindle journaled therein, and means enclosed withinsaid casing for rotating the spindle during its reciprocation by saidpistons.

4. A honing machine comprising, in combination, a Column, a work supportat the lower end of the column, a separately formed casing mounted uponthe upper end of the column and having a hollow extension at its upperforward end dispo-sed a substantial distance above the lower e-nd ofsaid casing, a splined spindle mounted centrally of said extension andparallel to the column, a pair of separately formed hydraulic cylindersof substantial length, means for clamping the lower end portions ofsai'd cylinders rigidly upon opposite sides of said extension with theupper portions of the cylinders projecting upwardly in parallel relationwith the fixed my signature.

ALBERT M. JOHNSON.

